App Logo

No.1 PSC Learning App

1M+ Downloads
The average age of 12 students is 20 years. If the age of one more student is included, the average decreased by 1. What is the age of the new student?

A7 years

B8 years

C6 years

D10 years

Answer:

A. 7 years

Read Explanation:

Total age of 12 students = 12 x 20 = 240 Total age of 13 students = 13 x 19 = 247 Age of the new students = 247 - 240 = 7


Related Questions:

A student was asked to find the arithmetic mean of the following 12 numbers : 3, 10, 8, 9, 13, 13, 10, 20, 16, 21, 14 and x He found the mean to be 12. The value of x will be
The average salary of the entire staff in Reliance Company is Rs.15000 per month. The average salary of officers is Rs.45000 per month and that of non-officers is Rs.10000 per month. If the number of officers is 20 then find the number of non-officers in the Reliance company.
നാല് സംഖ്യകളുടെ ശരാശരി 10 ആണ്. 5, 9 എന്നീ സംഖ്യകൾ കൂടി ഉൾപ്പെടുത്തിയാൽ പുതിയ ശരാശരി എത്ര?
അഞ്ച് ഏത്തപ്പഴത്തിന് 15 രൂപ എങ്കിൽ ഒരു ഏത്തപ്പഴത്തിന് ശരാശരി എത്ര രൂപയാകും ആകും?
(x + 2)/ x ന്റെയും (x -2)/ x ന്റെയും ശരാശരി എത്ര?